Pneumatic apparatus for the manufacture of cemented shoes



Nov. 21, 1950 c. F. DELSORDO 2,530,761

PNEUMATIC APPARATUS FOR THE MANUFACTURE I OF CEMENTED SHOES Filed April 17, 1947 4 Sheets-Sheet l N H m I NV EN TOR.

622/2 fiedsa/"ala ATTORNEY Nov. 21, 1950 c. F. DELSORDO PNEUMATIC APPARATUS FOR THE MANUFACTURE OF CEMENTED SHOES Filed April 17, 1947 4 Sheets-Sheet 2 INVENTOR.

ATTORNEY C. F. DELSORDO PNEUMATIC APPARATUS FOR THE MANUFACTURE Nov. 21, 1950 0F CEMENTED SHOES 4 Sheets-Sheet 3 Filed April 17, 1947 INVENTOR. Ca/@5 ZFeZLsaxufo ATTORNEY v Nov. 21, 1950 c. F. DELSORDO 2,530,761 PNEUMATIC APPARATUS FOR THE MANUFACTURE v OF CEMENTED SHOES Filed April 17, 1947 4 Sheets-Sheet 4 INV EN TOR.

I ATTORNEY Patented Nov. 21, 1950 OFFICE PNEUMATIC APPARATUS FOR THE MANU- FACTURE OFCEMENTED SHOES Carlos Fernando Delsordo, Mexico City, Mexico Application April 17, 1947, Serial No. 741,994 In Mexico April 24, 1946 Claims. 1

The present invention relates to apparatus for the manufacture Of footwear and especially shoes of the so-called cemented shoe type and relates more particularly to an apparatus constituted as a novel and original pneumatic press adapted for effecting perfect cementing of the sole during the manufacture of the aforesaid type of footwear, the said apparatus embodying advantages and improvements heretofore not associated with devices of this type and which will become readily apparent to those skilled in the art from a perusal of the present specification.

It is well known that in the cemented shoe industry it is customary to employ pressure created pneumatically or otherwise by special apparatus and machinery adapted fOr the purpose. However heretofore no apparatus or machine has been employed or known which was adapted for manufacturing shoes of all styles, sizes or models without requiring interchanging of the accurate pressure cushions needed for the various styles, sizes and models that constitute the complete lines demanded in shoes for children, men and women, especially when it is realized that such styles may be subdivided into flat and arched soles, low and more or less high heels, as well as womens high heeled shoes. As stated above, no machine for the pressure-cementing of soles has been available that can be employed for all of the distinct classes and sizes of shoes. In general, many changes must be made in the pressure-cementing machines to adapt them to the style, class and size of the shoes undergoing fabrication, and the prior art machines are all of very heavy construction, very costly, and exceedingly complicated, in addition to which they present various problems that increase the cost of production.

It is also to be noted that in the case of similar devices heretofore used and known, the sole must be much larger than the original mold and must be subsequently trimmed to impart a good finish to the shoe, and this presents various drawbacks such as: the sole does not become properly cemented at certain points; the contact pressure is faulty; the soles slide out of place as the pressure is applied; and, above all, there is the loss of time and increase in cost due to the manual labor involved in changing the pressure cushions and readjusting the machinery to adapt the same for the various types, sizes and styles of shoes that are to be fabricated. Moreover, such machines also require to be changed and adjusted, depending on whether left or right shoes are to be made.

The present invention has for its principal object the provision of a single apparatus or machine which provides for all of the movements necessary for cementing soles under pressure, which does not require the interchanging of pressure cushions or any change in the basic structure of the machine or apparatus, and which can be adjusted for the size, style, or class of shoe undergoing fabrication, without exception, including even those intended for babies, children, and men or women, and whether they be of the flat sole, arched type, or low heel or highest heel variety. The shoe finished on the new machine of the present invention is always perfectly true to the mold used and the contact of the sole at the place where it bears against the mold is always perfectly accurate. Moreover, the machine is adapted to make either left or right shoes, whether produced alternately or consecutively, without requiring the interchanging of cushions, inasmuch as operations are effected with one and the same cushion for all classes or styles.

The machine herein described and hereinafter claimed permits perfect control of the contact surface involved for the class and style of shoe undergoing fabrication without requiring an experienced operator since it is very simple and positive in operation. Furthermore the present machine is of ver light construction and easy to transport and assemble; it requires relatively little space and its manufacture presents no appreciable technical problems.

The foregoing as well as further features, advantages and differences over those Of the prior art will become apparent from the following specification taken in conjunction with the accompanying drawing which illustrates the invention and wherein like reference characters designate similar parts in the ten figures shown.

In the drawing:

Fig. l is a side elevation of a machine illustrative of the invention intended for the pneumatic pressure-cementing of soles during the manufacture of so-called cemented shoes, said machine or apparatus being shown in operating position with a womans shoe mold affixed thereto.

Fig. 2 is a view of the front of the same machine or apparatus.

Figs. 3 and 5 are top views of the adjustable plates mounted on the bed or frame of the apparatus and which carry the pressure and adjustment members that cooperate with the shoe molds.

Figs. 4 and 6 are sectional elevations corresponding to the preceding figures, taken approximately on lines 44 and 5-5 respectively.

Fig. 7 is a plan view viewed from above the bed or frame of the apparatus, upon which the pneumatic cushion reposes.

Fig. 8 is a side elevation corresponding to the preceding figure, of the bed or frame of the apparatus, shown partially in section taken on line B8 of Fig. '7.

Fig. 9 is a bottom view, with certain portions in section, of the pneumatic cushion.

Fig. 10 is a view in elevation and longitudinal section of the pneumatic cushion shown in Fig. 9.

Before proceeding with a detailed description of the apparatus of the invention, it is to be understood that the drawings are intended solely to represent a preferred form of the invention and that the latter is not limited exclusively to the specific details shown and described. Variations and modifications in the arrangement and form of the parts, depending on the exigencies encountered in practice, may therefore be embodied therein without departing from the principles and spirit thereof insofar as they come within the scope of the claims hereunto appended.

Generally considered, the machine or apparatus of the invention comprises four principal parts, to wit: the bed or frame of the apparatus on which the pneumatic cushion reposes, said bed being divided into three interconnected individual parts (Figs. 7 and 8) the interchangeable plates which are mounted on guide members on the bed or frame and which serve as adjustable pressure bridges for the separate molds (Figs. 3, 4, 5 and 6); the pneumatic cushion which rests and fits on the bed or frame of the apparatus (Figs. 9 and 10); and the support structure on which the front accessories are mounted and which is shown in combination with the other portions of the apparatus in Figs. 1 and 2.

Proceeding now with a detailed description of the present apparatus, the latter consists, as aforesaid, of the bed or frame II] composed of the front section H, intermediate section I2 and rear or back section I3. These three parts into which the bed If! is divided are associated in hinged relation by means of the pivots I4 and I5 which permit said bed to partake of various movements and to adjust itself to different planes and inclinations, depending on the setting of the section H relatively to the intermediate section I2 as well as the rear section I3, as is clearly shown in Fig. l.

The sections II and I3 of the bed or'frame II] are provided with lateral bent-over flanges i6 and IT for reasons hereinafter given. Moreover, a slotted lug i8 is provided below rear section I3 which carries by means of a pin movably mounted in the slot of lug I8 the arcuate, notched segment I9, each tooth of which serves as a heel height gauge, said segment I8 having a connecting arm pivoted at 2! in an apertured lug 22 attached to the bottom of section II of the bed In. The connecting arm 26 has an arcuate branch 23 pivoted to a slotted lug 24 attached to the bottom of the intermediate section I2 by means of a pin movably mounted in the slot of lug 24. vThe notched segment I9 controls the elevation and plane to which the section 13 of bed I 0 may be raised, whereas the central branch arm 23 controls the degree of inclination that it may be desired to impart to the intermediate section I2 of the bed I0, as is clearly shown in Fig. 1. By simultaneously moving the two mov- .4 able sections I2 and I3 of bed I 0 a perfectly natural orthopedic foot-like shape is produced while permitting the outer arch to be varied, starting at the origin of the arch and extending to the point where the arch meets the heel. Thus, the front part I I of the bed being stationary, its point of connection with the central section I2 constitutes the origin of the outer arch whereas the point of connection of this central part l2 with the rear portion [3 constitutes the end of the outer arch or start of the heel, the inclination of the arch representing the height of the heel, and, in general, the orthopedic outline of the foot or shape of the shoe.

The interchangeable plates shown in Figs. 3, 4, 5 and 6 of the drawing are designated as the front plate 25 and the rear plate 25; the former serves for adjusting and positioning the toe cap of the shoe and the latter for adjusting and positioning the sole at the heel portion. Both plates 25 and 26 are adjustable and slide on the guideways I6 and I! of the sections II and I3 of the bed III. The adjustment of said plates depends on the size and style of the footwear undergoing manufacture, each being adapted to be moved towards the other so as completely to cover the surface of the bed Ill used for holding the pressure cushion hereinafter described. Both plates 25 and 26, as clearly shown in Figs. 3 and 5 of the accompanying drawing, are provided with short recesses 21 and 28 which may be of various dimensions, depending on the class of shoe undergoing manufacture, and they receive the toe point and heel respectively of the shoe between r them, leaving a suitable surface for holding the pressure cushion so that the degree of pressure desired at the periphery of the sole of the shoe can be controlled. The aforementioned plates 25 and 26 slide by means of lateral guides 29 and 39 in the corresponding guides I6 and I! provided at the sides of the sections II and I3 of the bed Ill and can be separated or brought together as required by the size and style of the shoe undergoing manufacture.

Bridging the open end of the small recess 2'! of the front plate 25 is a holding element or bridge member constituted of notched bars 3| pivoted to the front plate 25 and rotatable in hinge-like lugs 32 engaging with and pivotable in lugs 33 (Fig. 4). These toothed bars 3I are associated in interchangeable pivoted relation with the bridge pieces 34 which press against the toe of the shoe mounted on its corresponding last 35. The bridge 34 may be provided with a sheath, as shown in Fig. 2 of the accompanying drawing, so as to protect the point of the shoe. The thumbscrews or the like 38 serve for adjusting the bridge 34 to the height suitable for achieving the correct pressure.

If the shoe on the mold 35 has any ornamentation at the point or if it is of a material adapted to produce the same when pressure is produced by the bridge 34, the central section I2 of the bed It may be provided with apertured lugs 31 through which a holding strip can be passed so that the shoe on the last 35 can be subjected to pressure in the instep portion.

As in the case of front plate 25, the rear plate 25 is pivoted by means of apertured lugs 39 and pin 40 to the toothed bars M which act as racks for setting the correct position of the rear bridge 42, the latter being locked in position by means of the thumbscrew 43. As in the previous case the height to which the bridge member 42 is adjusted by the racks 4| determines the pressure received by the sole that is being cemented to the shoe through agency of the pneumatic cushion hereinafter described.

The rear plate 26 is provided in its central portion at the end of the opening or short recess 28 with a flange 44 through which passes a screw 45 actuated by handle 46, the said screw pressing against an arcuate member 41 that in turn presses against the back of the shoe and serves automatically for adjusting it along the central orthopedic longitudinal line, thus also positioning the central point of the front of the last 35 and at the same time the central point of the back. By way of resume, therefore, this arrangement serves the purpose of properly adjusting and centering the shoe along its orthopedic line.

The pneumatic cushion which reposes on the three sections that compose the bed or frame is constituted of a pillow 48, preferably of leather or similar material, inside of which is housed the pneumatic chamber 49 which, at its front end is protected by an overlay 50 to prevent the lacing from endangering or damaging said chamber. Air under pressure is introduced by means of a valve stem 52 suitably attached to the chamber 49 and secured to the pillow portion 48 covering the same. This pressure cushion, as shown in Fig. '7 of the accompanying drawing, has a longitudinal strip 53 carrying indicia representing average shoe sizes which always makes it possible to ascertain the exact shoe sizes, measured from the starting point of the arch, so as to preserve the correct orthopedic line along which the shoe to be treated is positioned.

The structure used for supporting the entire apparatus may vary radically although the drawing shows by way of example a square box 54 to which is suitably attached the front section II of the bed as by means of screws passing through apertures 55 as shown in Fig. '7 of the accompanying drawing. A handle 56 located exteriorly of said box 54 serves to operate valve 58 for admitting air into or permitting escape of air from the pneumatic cushion, the stem 52 being connected to hose 51 attached in turn to the inlet valve 58 which is regulated and operated by means of handle 56. The aforesaid section ll of the bed 10 is provided with an aperture 59 to permit passage of the stem 52 of the pneumatic cushion. The said box 54 is provided with the necessary apertures for the passage of the arms l9 and 23 and the lugs 22 and is provided at its rear portion with a latch 60 for engaging the teeth or notches of the arm I9 which constitute the gauge means for controlling the height of the heel.

Obviously this box or structure of the apparatus may vary according to necessity, its purpose being to hold and sustain the elements that constitute the essential portion of the invention per se.

In order to subject a shoe mounted on its corresponding last 35 to the pressure of the apparatus of the invention only three manipulations are required as will readily be appreciated by those skilled in the art, the operation being absolutely and correctly controlled by the longitudinal orthopedic line and its transverse line from the point of origin of the outer arch, and, after pressure has been applied for the time necessary, depending on the type of adhesive, cement, or glue employed, only three manipulations are required for removing the finished shoe. These manipulations for positioning and removing the shoe during its fabrication are alike and the same for all styles and sizes of footwear.

Having thus described the invention, what is considered novel and claimed is:

1. In a machine for use in the manufacture of shoes, the combination comprising a support, a sectional bed including a front section fixed to the support, an intermediate section pivoted at one end to the front section, a rear section pivoted to the other end of the intermediate section, means angularly adjustably mounted on the front section and slidably and pivotally connccted to the intermediate and rear sections, a pneumatic cushion supported on the bed, a recessed front plate adjustable lengthwise of the front section, extensible bridge means mounted on the front plate and bridging the recess, a recessed rear plate adjustable lengthwise of the rear section, and extensible bridge means mounted on the rear plate and bridging the recess thereof.

2. The combination according to claim 1 and wherein the angularly adjustable means includes an arm pivoted to the front section, a notched segment rigid with the arm and supporting the rear section in slidably and pivotally adjustable relation, and a latch on said support for selective engagement with the notches of said segment to support said intermediate and rear sections at predetermined angles with respect to said front section.

3. The combination according to claim 1 and wherein the angularly adjustable means includes an arm pivoted to the front section, an arcuate branch rigid with the arm and slidably pivoted to the intermediate section, a notched segment rigid with the arm and connected to the rear section in slidably and pivotally adjustable relation and a latch on said support for selective engagement with the notches of said segment to support said intermediate and rear sections at predetermined angles with respect to said front section.

4. The combination according to claim 1 and wherein each bridging means includes a bridge piece and a pair of sleeves, each pivoted to an end of the piece, a pair of bars each pivoted to the respective plate and adjustably secured in a sleeve.

5. The combination according to claim 1 and further comprising means supported by the rear plate and adjustably engaging a shoe resting on the cushion.

CARLOS FERNANDO DELSORDO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,946,490 Finn Feb. 13, 1934 2,057,039 MacDonald Oct. 13, 1936 2,060,061 Finn Nov. 10, 1936 2,080,037 Finn May 11, 1937 2,149,391 Finn Mar. '7, 1939 2,337,093 Finn Dec. 21, 1943 2,445,848 Finn July 27, 19 18 FOREIGN PATENTS Number Country Date 622,393 Germany Nov. 2'7, 1935 

